Lighting system

A lighting system comprising:

• a light-emitting unit provided on an inner surface of a vehicle door;
• a first sensor configured to detect an object around a vehicle;
• a control device configured to control the light-emitting unit based on a detection result of the first sensor;
• and
• a second sensor configured to detect brightness around the vehicle, wherein
• the control device is configured to light the light-emitting unit or blink the light-emitting unit on and off in a first color for calling attention in response to a detection of an object by the first sensor, and also configured to adjust luminance when the light-emitting unit is lighted or blinked on and off, according to the brightness detected by the second sensor, and
• the control device is configured to light the light-emitting unit or blink the light-emitting unit on and off in a second color, which is different from the first color, in response to no detection of an object by the first sensor.